**5. Conclusions**

The complex of experimental studies allowed us to obtain some actual results that can be used for further development of research in the field of development of DLC for the needs of tool production.


DLC, which has lower plasticity (greater modulus of elasticity), occurs at a significantly (almost two times) lower load. Simultaneously, the wear rate under the influence of abrasive particles on (CrAlSi)N/DLC-coated hard alloy samples are 2.4 times lower than uncoated samples and 1.5 times lower than single-layer DLC-coated samples.


**Author Contributions:** Conceptualization, S.N.G.; methodology, M.A.V.; validation, S.V.F.; formal analysis, M.A.V. and S.V.F.; investigation, M.M. and S.V.F.; resources, S.N.G.; data curation, M.A.V.; writing—original draft preparation, S.V.F. and M.A.V.; writing—review and editing, S.N.G., M.A.V., S.V.F., and M.M.; visualization, M.M.; supervision, M.A.V.; project administration, S.N.G. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work was supported by the Russian Science Foundation under grant 18-19-00599.

**Acknowledgments:** The work was carried out using the equipment of the Center of collective use of MSUT STANKIN.

**Conflicts of Interest:** The authors declare no conflict of interest.
